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PE.
FOAM
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PS.
FOAM
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PU.
FOAM
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AEROFLEX
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| PE. FOAM : this plastic insulation is manufactured from polyethylene plastic with a density of 2 lb/cubic ft. Most of PE. insulation is highly combustible and causes a rapid flame transfer. It will melt and produce a flaming balls (fire balls), causing flame transfer to other materials in the building such as ceilings, carpets and furnitures. | PS. FOAM : a white foam insulation produced from polystyrene plastic with a density of 1-2 LB/cubic ft. Even use self-extinguish type, but it must be wrapped with fabric and coated with bitumen when actually applied. Fabric and bitumen are highly inflammable producing black smoke. It also melts to form flaming balls (fire balls) thus easily transferring the flame to other areas. | PU. FOAM : a polyurethane foam insulation made of polyols mixed with polyisocyanates. Even though the self-extinguishing grade is used, it will still produce large quantities of smoke while burning and produces hydrogencyanide gas (HCN), one of the most noxious gases which is fatal to the victims within a very short time (HCN 300 ppm only will be fatally noxious within 2-3 mins.) | AEROFLEX : Aeroflex insulation is made of a synthetic polymers mixed with a very large quantity of fire-extinguishing and smoke reducing substances. It will not melt, does not produce flaming balls (fire balls) and produces a low smoke density. Most of the gas produced will be hydrocarbon and carbondioxide which are minimally noxious when compared to hydrogencyanide gas. The fire will extinguish by itself within a short time when the flame is suffocated or removed. |
| * The tests are almost
equivalent to the standards of UL 94, ASTM D 1692 - 74 and DIN 4102 (using
insulation samples of 2" x 6" x 3/4" in size). ** For the easily inflammable insulation, lighter flame will be directed at the corner for 15 seconds ; but for the hardly inflammable insulation, welding / torch flame will be directed to it for the same amount of time. These experiments demonstrate relative combustibility. |
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